Liquid cooled heat dissipator

ABSTRACT

A liquid cooled heat dissipator includes water channels, rows of heat dissipating fins respectively received in a corresponding one of the water channels and each heat dissipating fin having a ridge and a trough, a first water tank mounting seat having first openings defined to respectively communicate with the water channels, a second water tank mounting seat opposite to the first water tank mounting seat and having multiple second openings respectively communicating with the water channels, a first water tank in the first water tank mounting seat and a second water tank mounted in the second water tank mounting seat for turning water flow in the water channels.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a liquid cooled heat dissipator, and more particularly to liquid cooled heat dissipator having multiple aluminum fins and a tin alloy welding layer formed inside the heat dissipator to enhance heat dissipating efficiency.

2. Description of the Prior Art

An air cooled heat dissipator mainly is using air as the heat dissipating medium to dissipate heat absorbed by fins of the heat dissipator. To enhance the heat dissipating efficiency, aluminum is adopted to be the material for making the fins, which is light weight and having a feature of fast heat dissipating capability.

For a liquid cooled heat dissipator, it is noted that the heat dissipating ability depends on the heat exchange rate between the liquid and the fins. To increase the heat exchange rate, bronze is normally the best choice to make the water channel and the fins in the liquid cooled heat dissipator.

To further analyze the characteristics of bronze, it is learned that although the metal, bronze, has great heat absorption efficiency, it does not have high heat dissipating capability. Eventually, the overall heat dissipating efficiency of the liquid cooled heat dissipator is not as good as expected and can not be improved.

To overcome the shortcomings, the present invention tends to provide an improved liquid cooled heat dissipator to mitigate the aforementioned problems.

SUMMARY OF THE INVENTION

The primary objective of the present invention is to provide an improved liquid cooled heat dissipator having a fan to increase the heat dissipating efficiency.

In order to accomplish the foregoing objective, the liquid cooled heat dissipator of the present invention has multiple channels, multiple rows of heat dissipating fins each received in a corresponding one of the channels, multiple tin alloy welding layer provided on two opposed inner side faces of each of the channels so as to secure each row of heat dissipating fins inside the corresponding channel and between a securing plate and an outer side face of a top most channel and a bottom most channel such that the overall heat exchange rate is increased.

Preferably, the tin alloy welding layer is attached to a ridge of each heat dissipating fin.

Preferably, each heat dissipating fin has a layer of bronze plated thereon.

Other objects, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of the liquid cooled heat dissipator with the fan removed;

FIG. 2 is an exploded perspective view of the liquid cooled heat dissipator in FIG. 1;

FIG. 3 is a side plan view of the liquid cooled heat dissipator in FIG. 1;

FIG. 4 is a partially cross sectional view of the liquid cooled heat dissipator in FIG. 1;

FIG. 5 is a partially exploded cross sectional view of a second embodiment of the liquid cooled heat dissipator of the present invention;

FIG. 6 is an exploded perspective view showing that the liquid cooled heat dissipator is associated with a heat absorption device;

FIG. 7 is a perspective view showing the combination of the liquid cooled heat dissipator and the heat absorption device are combined; and

FIG. 8 is a schematic perspective view showing the application of the present invention, wherein a heat dissipating fan is added.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

With reference to FIGS. 1, 2, 3 and 4, it is noted that the liquid cooled heat dissipator in accordance with the present invention includes eight water channels (10) superposed on top of each other, two securing plates (20) respectively mounted on a top face of a top most water channel (10) and a bottom face of a bottom most water channel (10), multiple rows of heat dissipating fins (30) respectively and securely received in a corresponding one of the water channels (10), a layer of tin alloy welding layer (40) provided on two opposed inner side faces of each water channel (10) and between the securing plate (20) and the top most water channel (10) and between the securing plate (20) and the bottom most water channel (10), a first water tank mounting seat (50) formed on a side of the combined water channels (10), a second water tank mounting seat (60) formed on the other side of the combined water channels (10) to be opposite to the first water tank mounting seat (50), a first water tank (70) to be seated inside the first water tank mounting seat (50) and a second water tank (80) to be seated inside the second water tank mounting seat (60). A fan supporting plate (90) is provided on a free side face of the securing plate (20) for mounting a fan (not shown).

The eight water channels (10) are securely combined with each other and each water channel (10) has a row of heat dissipating fins (30) received therein. Each row of heat dissipating fins (30) has multiple ridges (31) and troughs (32). The layer of tin alloy welding layer (40) is provided on two opposed inner side faces of each water channel (10) and between the securing plate (20) and the top most water channel (10) and between the securing plate (20) and the bottom most water channel (10). The layer of tin alloy welding layer (40) provided on two opposed inner side faces of each water channel (10) is able to engage with the ridges (31) of each row of heat dissipating fins (30).

The first water tank mounting seat (50) has a first elongated plate (51) securely connected to one side of the combined water channels (10) and provided with eight first openings (511) respectively communicating with each of the eight water channels (10). Two free sides of the first elongated plate (51) are respectively and securely engaged with the two securing plates (20). The first elongated plate (51) further has a first skirt (52) formed on a peripheral edge of the first elongated plate (51) and multiple bendable first fingers (53) formed on a free edge of the first skirt (52).

The second water tank mounting seat (60) has a second elongated plate (61) securely connected to the other side of the combined water channels (10) and provided with eight second openings (611) respectively communicating with each of the eight water channels (10). Two free sides of the second elongated plate (61) are respectively and securely engaged with the two securing plates (20). The second elongated plate (61) further has a second skirt (62) formed on a peripheral edge of the second elongated plate (51) and multiple bendable second fingers (63) formed on a free edge of the second skirt (62).

The first water tank (70) is provided with a first casing (71) sealingly connected to the first elongated plate (51) with a first sealing ring (700) sandwiched therebetween, a first flange (72) formed on a peripheral edge of the first casing (71) to be securely connected by the first fingers (53) after the first fingers (53) are bent, an inlet (73) and an outlet (74). The first water tank (70) further has an inflow chamber (711) formed on a bottom portion of the first water tank (70) to communicate with the inlet (73) and bottom most two first openings (511), an outflow chamber (712) formed on a top portion of the first water tank (70) to communicate with top most two first openings (511) and a mediate chamber (713) sandwiched between the inflow chamber (711) and the outflow chamber (712) to communicate with the outlet (74) and mediate four first openings (511).

The second water tank (80) has a second casing (81), a second flange (82) formed on free edge of the second casing (81), a bottom chamber (811) in communication with bottom most four second openings (611) and a top chamber (812) in communication with top most four second openings (611). Two fan brackets (90) are respectively provided on a free side face of the two securing plates (20) via threaded bolts (not numbered).

In this embodiment, the heat dissipating fins (30) are made of aluminum and may be plated with a layer of bronze.

When this embodiment is in application, the inlet (73) is connected to a water source and the outlet (74) may be connected to a drainage pipe (not shown). After fresh water flows in the inlet (73), the inlet chamber (711) is then filled with fresh water. Then the fresh water flows to the bottom chamber (811) from the bottom most two openings (511, 611). Because the bottom chamber (811) communicates with four second openings (611), the water flows to the two second openings (611) above the bottom most two second openings (611) and eventually flows to the mediate chamber (713). Again, because the mediate chamber (713) communicates with four first openings (511), the water flows to the top chamber (812) and then flows to the outflow chamber (712) and out of the first water tank (70) via the outlet (74). The water path inside the heat dissipator of the present invention is zigzagged such that each heat dissipating fin (30) absorbing heat from the heat source engages with the water to allow the water to take away the heat.

With reference to FIG. 5, it is noted that in this embodiment, the tin alloy welding layer (40) is composed of multiple strips (40A) respectively connecting with ridges (31) of the rows of the heat dissipating fins (30).

With reference to FIG. 6, it is noted that a pump (A) is provided to connect to the inlet (73). A first connector (B) connecting to an inflow pipe (C) is connected to the pump (A). A second connector (D) is connected to the outlet (74) and a transparent reservoir (F) via a connecting pipe (E). The transparent reservoir (F) has a cap (G) on a side of the transparent reservoir (F) such that when the water level observed directly from outside the transparent reservoir (F) is low, the operator may add in water to the transparent reservoir (F) by removing the cap (G). An outflow pipe (H) is connected to the transparent reservoir (F). A free end of the inflow pipe (C) and of the outflow pipe (H) is respectively connected to a first universal joint (J) and a second universal joint (K), where both the first universal joint (J) and the second universal joint (K) are connected to a heat absorption device (I). Therefore, after a fan (L) is mounted on the fan supporting plates (90), heat absorbed by the water flowing through the rows of the heat dissipating fins (30) is dissipated by the air flow which is stirred by the fan (L). In addition, the heat absorption device (I) may also facilitate the heat dissipating efficiency while the pump (A) is pumping water through the heat absorption device (I). The first universal joint (J) and the second universal joint (K) help prevent the inflow pipe (C) and the outflow pipe (H) from being tangled.

From the aforementioned description, it is noted that with the features of the water channels (10) which are made of bronze, heat is absorbed quickly. In addition, with the features of the heat dissipating fins (30) which are made of aluminum, heat dissipating efficiency is great. Combining the water channel (10) and the heat dissipating fins (30) together, heat absorption and heat dissipating efficiency are both great.

It is to be understood, however, that even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed. 

1. A liquid cooled heat dissipator comprising: water channels superposed on top of each other, the water channels being made of bronze; rows of heat dissipating fins respectively received in a corresponding one of the water channels and each heat dissipating fin having a ridge and a trough; a tin alloy welding layer provided between two opposed inner sides of the water channels to provide secure engagement between the ridges and the inner sides of the water channels; a first water tank mounting seat formed on a side of the superposed water channels and having first openings defined to respectively communicate with the water channels; a second water tank mounting seat formed on a side of the superposed water channels to be opposite to the first water tank mounting seat, the second water tank mounting seat having multiple second openings defined to respectively communicate with the water channels; a first water tank mounted in the first water tank mounting seat, the first water tank having an inlet for providing water to the water channels and an outlet respectively communicating with an interior of the first water tank; and a second water tank mounted in the second water tank mounting seat for turning water flow in the water channels.
 2. The liquid cooled heat dissipator as claimed in claim 1, wherein the tin alloy welding layer is composed of elongated strips respectively connecting the ridges of the rows of the heat dissipating fins to the inner sides of the water channels.
 3. The liquid cooled heat dissipator as claimed in claim 1, wherein each heat dissipating fin is provided with a layer of bronze plated thereon.
 4. The liquid cooled heat dissipator as claimed in claim 3, wherein the first water tank is provided with an inflow chamber communicating with bottom most two first openings of the first water tank mounting seat and bottom most two water channels, an outflow chamber communicating with top most two first openings of the first water tank mounting seat and top most two water channels and a mediate chamber communicating with remaining first openings of the first water tank mounting seat and the water channels.
 5. The liquid cooled heat dissipator as claimed in claim 1, wherein the second water tank is provided with a bottom chamber communicating with half of the second openings of the second water tank mounting seat and a top chamber communicating with the other half of the second openings of the second water tank mounting seat.
 6. The liquid cooled heat dissipator as claimed in claim 4, wherein the second water tank is provided with a bottom chamber communicating with half of the second openings of the second water tank mounting seat and a top chamber communicating with the other half of the second openings of the second water tank mounting seat.
 7. The liquid cooled heat dissipator as claimed in claim 1, wherein two securing plates are respectively provided between the first water tank mounting seat and the second water tank mounting seat and on a top of top most water channel and on a bottom of bottom most water channel.
 8. The liquid cooled heat dissipator as claimed in claim 4, wherein two securing plates are respectively provided between the first water tank mounting seat and the second water tank mounting seat and on a top of top most water channel and on a bottom of bottom most water channel.
 9. The liquid cooled heat dissipator as claimed in claim 6, wherein two securing plates are respectively provided between the first water tank mounting seat and the second water tank mounting seat and on a top of top most water channel and on a bottom of bottom most water channel.
 10. The liquid cooled heat dissipator as claimed in claim 6, wherein a pump is connected to the inlet and the pump is connected to a heat absorption device via an inflow pipe connecting to the first connector and a first universal joint, a transparent reservoir is connected to the outlet via a connecting pipe connecting to and communicating with the transparent reservoir and a second connector connecting to the outlet, the transparent reservoir is connected to the heat absorption device via an outflow pipe connecting to and communicating with the transparent reservoir and a second universal joint connected too the heat absorption device.
 11. The liquid cooled heat dissipator as claimed in claim 9, wherein a pump is connected to the inlet and the pump is connected to a heat absorption device via an inflow pipe connecting to the first connector and a first universal joint connected to the heat absorption device, a transparent reservoir is connected to the outlet via a connecting pipe connecting to and communicating with the transparent reservoir and a second connector connecting to the outlet, the transparent reservoir is connected to the heat absorption device via an outflow pipe connecting to and communicating with the transparent reservoir and a second universal joint connected to the heat absorption device. 